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45 lines
2.4 KiB
Protocol Buffer
45 lines
2.4 KiB
Protocol Buffer
// SPDX-License-Identifier: BSD-3-Clause
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// SPDX-FileCopyrightText: 2018-2020 Carles Fernandez-Prades <carles.fernandez@cttc.es>
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syntax = "proto3";
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package gnss_sdr;
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/* GnssSynchro represents the processing measurements at a given time taken by a given processing channel */
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message GnssSynchro {
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string system = 1; // GNSS constellation: "G" for GPS, "R" for Glonass, "S" for SBAS, "E" for Galileo and "C" for Beidou.
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string signal = 2; // GNSS signal: "1C" for GPS L1 C/A, "1B" for Galileo E1b/c, "1G" for Glonass L1 C/A, "2S" for GPS L2 L2C(M), "2G" for Glonass L2 C/A, "L5" for GPS L5 and "5X" for Galileo E5a
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uint32 prn = 3; // PRN number
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int32 channel_id = 4; // Channel number
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double acq_delay_samples = 5; // Coarse code delay estimation, in samples
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double acq_doppler_hz = 6; // Coarse Doppler estimation in each channel, in Hz
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uint64 acq_samplestamp_samples = 7; // Number of samples at signal SampleStamp
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uint32 acq_doppler_step = 8; // Step of the frequency bin in the search grid, in Hz
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bool flag_valid_acquisition = 9; // Acquisition status
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int64 fs = 10; // Sampling frequency, in samples per second
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double prompt_i = 11; // In-phase (real) component of the prompt correlator output
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double prompt_q = 12; // Quadrature (imaginary) component of the prompt correlator output
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double cn0_db_hz = 13; // Carrier-to-Noise density ratio, in dB-Hz
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double carrier_doppler_hz = 14; // Doppler estimation, in [Hz].
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double carrier_phase_rads = 15; // Carrier phase estimation, in rad
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double code_phase_samples = 16; // Code phase in samples
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uint64 tracking_sample_counter = 17; // Sample counter indicating the number of processed samples
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bool flag_valid_symbol_output = 18; // Indicates the validity of signal tracking
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int32 correlation_length_ms = 19; // Time duration of coherent correlation integration, in ms
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bool flag_valid_word = 20; // Indicates the validity of the decoded navigation message word
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uint32 tow_at_current_symbol_ms = 21; // Time of week of the current symbol, in ms
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double pseudorange_m = 22; // Pseudorange computation, in m
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double rx_time = 23; // Receiving time after the start of the week, in s
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bool flag_valid_pseudorange = 24; // Pseudorange computation status
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double interp_tow_ms = 25; // Interpolated time of week, in ms
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}
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/* Observables represents a collection of GnssSynchro annotations */
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message Observables {
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repeated GnssSynchro observable = 1;
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}
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